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Blood Cells and Bone Marrow

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From The Biology of Prenatal Development.

Script: Tegen week 15 verschijnen bloedvormende stamcellen die zich vermenigvuldigen in het beenmerg. Hier vindt grotendeels de vorming van bloedcellen plaats.

All ages referenced to fertilization, not last menstrual period. One month = 4 weeks.

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Blood Cells and Bone Marrow

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Blood Cells and Bone Marrow

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3 months, 3 weeks